Loose leaf binder



Feb. 6, 1934. s. B. FREIBERG LOOSE LEAF BINDER Filed March 1, 1930 Fig 6fan l B. Fre/be y patented Feb. 6, 1934 UNITED STATES PATENT OFF-ICE 5Claims.

This invention relates to loose leaf filing devices of the charactershown in Freiberg Patent No. 1,919,784, dated July 25, 1933, and filedAugust 14, 1929. I

An object of the invention is to provide simple means whereby all or asubstantial part of the record or loose leaf sheets may be handled as aunit in removing and inserting such sheets in relation to the binder. I

Another object is to facilitate proper registry of sheets when insertedas a unit in such binder.

These and other objects are attained-by the means described herein anddisclosed in the accompanying drawing, in which:

Fig. 1 is a cross sectional view embodying the invention.

Fig. 2 is a sectional view on line 2-2 of Fig. 1.

Fig. 3 is a fragmental perspective view of a detachable prong barforming a detail of the invention.

Fig. 4 is a perspective view of a support bar or carrier bar forming adetail of the invention.

The binder shown herein comprises a U-shaped main back member to thearms 10 and 11 of which are hinged back members such as 12. Between thearms 10 and 11 are disposed opposed sets of prongs l3 and 14. The prongsreceive record sheets 15 that are shiftable upon the prongs. The set ofprongs 13 is carried by a support or prong bar 16. The prong bar 16 maybe shiftable as shown in said Freiberg application. The set of prongs 14is carried by 2. prong bar 17. The prong bar 17 is detachably secured tosupport bar 18. In order to facilitate proper positioning of the prongbar 17 on support bar 18, said bars are provided with registering andcooperating lugs and recesses 19 and 20, respectively. Suitable securingmeans such as screws 21 are used for securing the bars upon one another.The sockets provided in the support bar 18 for the threaded ends ofscrews 21 are preferably screw-threaded, thereby obviating the use ofnuts for securing the screws or bolts.

The structure disclosed herein is similar to that disclosed in the saidFreiberg application, in that the support bar 18 and prong bar 17 aremovable as a unit for effecting vertical shifting of prongs 14 relativeto the prongs 13.

Preferably, though not necessarily, the bars 17, 18, and 2'7 togetherwith bolt 25 are movable vertically as a unit, the bar 2'7 sliding in apassageway 28 which is provided between arm member 11 and a wall 30which is disposed in spaced parallelism with said arm. Said wall 30 isprovided with one or more substantially vertical slots 26 showing abinder through which extends the bolt 25, the slot 26 being no widerthan the diameter of bolt 25 so that the washer 29 may not passtherethrough.

The bolt 25 screw threadedly engages the bar 18,

as shown, after passing through the member 27.

The bar 27 moves bodily with screw 25 and bar 18. The-bar 16 may beslidably mounted for movement lengthwise of the member 10 within a wayor channel formed by the'vertical wall 12 which is disposed in spacedparallelism withthe arm 10. The bar'16 may be maintained within thespace betweenmembers 10 and 12 by means of a screw 32 which passesthrough an elongated slot 31 in part 12 and threadedly engages the bar16, as shown. The elongated opening 31 extends longitudinally of thewall 12. The bar 16 maybe shifted manually or otherwise. The interiormember 1230 may. be. fixed relative to the binder back member 1011 inany suitable manner, such as by the use of screws, rivets, and adhesive,or the like, not shown.

When it is desired to transfer all or a substantial part of the sheets15 from one binderto another, such transfer may be expeditiouslyaccomplished by withdrawing the screws or bolts 21 and then detachingthe prong bar 1'7 and its associated prongs 14, together with the sheetsimpaled on prongs 14. After transfer of the sheets 15 from prongs 14 tosimilar prongs in another binder, the prong bar is remounted on supportbar 18. By providing a system of binders having interchangeable prongbars such as 17, it is possible to readily transfer records, as a group,from one binder to another.

The prong bar and its cooperating support bar are preferably molded ofcelluloid, condensation products from formaldehyde and phenol, includingfabric impregnated therewith, resinous and similar compositions,including laminations of fabric, and fibrous materials, etc.

What is claimed is:

1. In a binder the combination with a rigid unitary back member and acover leaf extending from the back, of a pair of overlapping opposedsheet supporting arched prongs cooperatively related for togethersubstantially spanning the back to provide a means whereby sheets may beregularly shifted relative the cover leaf from one of the prongs to theother, a bar supported by the binder back and having secured thereto oneprong of the pair of cooperative opposed prongs, the associated prongand bar of themselves providing a transferring means for binder sheets,and means for mounting the bar upon a part of posed prongs, theassociated prong and bar of themselves providing a transferring meansfor binder sheets, and means mounting the bar upon a part of the binderback for detachment of the bar in a direction perpendicularly of thebinder back.

3. In a binder the combination with a rigid unitary back member and acover leaf extending from the back, the cover leaf being attached to theback by means of a single hinge, of a pair of opposed arched sheetsupporting prongs cooperaxti'vely related ,for together substantiallyspanning the back to provide a means whereby sheets may be regularlyshifted relative the cover leaf from one of the prongs to the other, abar normally stationarily supported by the binder back and havingsecured thereto one prong of the pair of cooperative opposed prongs, theassociated prong and bar of themselves providing a transferring meansfor binder sheets, means mounting the bar upon apart of the binder backfor detachment of the bar in a direction perpendicularly of the *binderback, and cooperative means on the bar and back for aligning the barupon the binder 'back.

4. In a binder for sheets the combination with a rigid unitary backmember, of a pair of opposed sheet supporting prongs at least one ofwhich is arched over to substantially meet the other, whereby tosubstantially span the back member to provide means whereby sheets maybe regularly shifted from one of the prongs to the other, a prong barnormally stationarily supported relative to the back member and havingsecured thereto one prong of the pair of cooperative opposed prongs, theassociated prong and bar of themselves providing a transfer means forbinder sheets, a support bar for the prong bar and means for mountingthe support bar for limited movement relative to the back member, andmeans for removably securing the prong bar to the support bar fordetachment of the prong bar in a direction substantially perpendicularlyof the back member. 7

5. In a binder for sheets the combination with a rigid unitary backmember, of a pair of opposed sheet supporting prongs at least one ofwhich is arched over to substantially meet the other, whereby tosubstantially span the back member. to provide means whereby sheets maybe regularly shifted from one of the prongs to the other, a prong barnormally stationarily supported relative to the back member and havingsecured thereto one prong of the pair of cooperative opposed prongs, theassociated prong and bar of themselves providing a transfer means forbinder sheets, a support bar for the prong bar and means for mountingthe support bar upon the back member, and means for removably securingthe prong bar to the support bar for detachment of the prong bar in adirection substantially perpendicularly of the back member;

STANLEY B. FREIBERG.

